A quick way to get the dimensions for a bunch of digital photo images.

This

SourceFile ImageSize
adipiscing.jpg 2400×2400
dolor.jpg 1920×2400
sit.jpg 1602×2400
ipsum.jpg 1731×2400
consectetuer.jpg 1602×2400
Lorem.jpg 1602×2400
Maecenas.jpg 2400×720
elit.jpg 2400×613

in other words.

ExifTool will do that for you:
exiftool -csv -T -Imagesize * > out.csv

Other ways to do it are here